A laundry treating apparatus including an outer case; an inner case disposed in the outer case and providing a laundry receiving space; a supply air hole communicating with the laundry receiving space; a heat exchange channel having an inlet end where air is introduced and a discharge end where the air is discharged; a heating device for heating air passing through the heat exchange channel; and a supply air duct connecting the discharge end of the heat exchange channel and the supply air hole, the supply air duct is disposed in a rear of the inner case.